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[Unconfirmed][Archive]

# Steam achievement lists exposed unannounced projects — not firm release promises

The list exposure was reported widely; the inferred unannounced projects and their contents still need publisher confirmation.

Published 09 Nov 2026, 02:21 UTC

Leaked on 09 September 2026

![Original Leakly terminal-style archive card: Steam achievement lists exposed unannounced projects — not firm release promises](https://leakly.com/assets/og/steam-private-achievements.png)

A Steam data exposure offered an early view of games that had not been fully announced, through information normally treated as background infrastructure. On 9 September 2026, Gematsu and other outlets reported that achievement lists for numerous unreleased or unannounced projects had become visible through tracking sites. IGN, GamesRadar and The Verge covered the scale of the disclosure.

The lists appeared on achievement tracker Exophase. Its owner said information that should have been private seemed to have become accessible through Steam’s API and was then scanned by the site. That is an explanation from the operator who observed the behavior, not a published Valve incident report establishing the root cause.

The reporting identified familiar franchises and projects that had not been officially detailed. We do not reproduce the achievement text or potential plot spoilers. The useful story is how a supporting service can expose a publisher’s plans even when its promotional materials remain under wraps.

There are two separate claims to keep apart. The appearance of lists was documented by multiple outlets. The idea that every label represented a current, approved game with a fixed content plan was not. Achievement records can relate to work in progress, tests, changed projects or misleading metadata. A plausible franchise name is not a release announcement.

The unconfirmed badge applies to the inferred unannounced projects and their contents. It does not deny that the visible-list incident occurred. The verified Gematsu X post shows how the reporting spread, but its engagement is only one captured snapshot, not a measure of the whole leak’s reach. This archive links coverage rather than direct lists or extracted files. Confirmation would require the relevant developers or publishers to announce the projects or explain the exposed records.

[Unconfirmed]

## What happened later

The list exposure was reported widely; the inferred unannounced projects and their contents still need publisher confirmation.

## Sources & captured post

> **Gematsu** @gematsu
>
> \*Updated post title\* Persona 6, Kingdom Hearts IV, and other Steam Achievements surface in large-scale leak https://t.co/eFRcOAeo4B https://t.co/rbW9uRGvrW https://t.co/Z0keSHnI7R
>
> 716 likes · 108 reposts · counts as of 09 Nov 2026, 01:46 UTC
>
> [View the post on X](https://x.com/gematsu/status/2097522117700956489) · not in our leaker index

### Original source & corroborating coverage

* [Original X post by @gematsu](https://x.com/gematsu/status/2097522117700956489)
* [The Verge — Steam achievements leaked for dozens of unreleased and unannounced games.](https://www.theverge.com/games/992006/steam-achievements-leaked-for-dozens-of-unreleased-and-unannounced-games)
* [GamesRadar — Steam is seemingly responsible for one of the biggest leaks in years: Persona 6, Kingdom Hearts 4, Fable, Metro 2039, and over 70 other games see achievements spill online](https://www.gamesradar.com/games/kingdom-hearts/kingdom-hearts-4-persona-6-and-various-unannounced-games-allegedly-see-their-achievements-go-public-as-part-of-massive-steam-leak/)
* [IGN — Persona 6, Kingdom Hearts 4 Achievements Leak on Steam](https://me.ign.com/en/kingdom-hearts-iv/247935/apparent-steam-leak-reveals-persona-6-and-kingdom-hearts-4-achievements-unannounced-games)

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